Date-calculator.



PATENTED OCT. 10, 1905.

J. L. MILTON.

DATE CALCULATOR.

APPLIOATION FILED NOV. 16. 1904.

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WITNESSES: www 01? ALAUOHNEYJ ANDREW B swam cu. moro-muocmnuzns. wasmusron. n c.

PATENTED OCT. 10, 1905.

J. L. MILTON.

DATE CALCULATOR.

APPLICATION FILED NOV. 16, 1904.

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WITNESSES:

455a; ATTOHNEKS JOHN L. MILTON, OF NEIV YORK, N. Y.

DATE-CALCULATOR.

Specification of Letters Patent.

Patented Oct. 10, 1905.

Application filed November 16, 19044 Serial No. 232,940

To all whom it may concern:

Be it known that I, JOHN L. MILTON, a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Date Calculators, of which the following is a specification, reference being had therein to the accompanying drawings, in which- Figure 1 is a plan view of the device; Fig. 2, a vertical sectional view thereof; Fig. 3, an enlarged view of a portion thereof; Fig. 4:, a detail view of the calendar-strip, and Fig. 5 a sectional view on the line V V of Fig. 4.

The objects of the invention are to provide for the use of banks or other business concerns handling and negotiating promissory notes and like securities a device for calculating mechanically the exact number of days between two dates where the interval between the dates is less than one year; to determine the date of the maturity of a note where the note is made to run for a period less than one year, and, further, to determine on what day of the week such a note or other obligation will mature. This latter feature of the invention is particularly important in order that it may be determined almost instantly whether a note matures on Saturday or Sunday.

To the accomplishment of these objects and such others. as may hereinafter appear the invention consists of the parts and combination of parts hereinafter fully described, and particularly pointed out in the appended claims.

Referring to the various parts by letters, a designates the main and largest disk of the device, which forms the base-plate of the device; b, the intermediate disk, which is placed upon the main disk, and 0 the uppermost and smallest disk of the series, this latter disk being placed upon the intermediate disk 6. The disks 6 and 0 are concentrically mounted upon a pivot d, supported centrally in the base-plate, and are adapted to be freely and independently rotated. It is of course to be understood that the main disk may rotate, too, if desired, a suitable support being provided for it. It is only necessary, however, that the intermediate and upper disks be rotatable. The main disk, or that portion of it projecting beyond the edge of the intermediate disk, is divided by radial lines into three hundred and sixty-five divisions, one division for each day of the year, the last division bearing a distinguishing character, such as 0 or zero, or it may be colored or made solid black, or,

if desired, it may bear the number 365. It is desirable, however, that this division be marked distinctively in order that it may be readily noted. Every fifteenth division on this disk is preferably marked with some distinguishing symbol or mark in order that the number of days for which notes are usually made to runforinstance,thirty,sixty,ninety, &c.may be readily located on .the main disk. The intermediate disk is also divided at its edge into an annular series 0 of three hundred and sixty-five divisions. These divisions are numbered consecutively according to the number of days in each month, and each set of divisions bears the name of a month. It will of course be understood that the months are arranged in regular order around the disk. The smaller and topmost disk is also divided at its periphery into a series f of three hundred and sixty-five divisions, which bear the names of the days of the week consecutivelyarranged. The divisions indicating Saturday and Sunday are distinguished from the other day divisions by any suitable means. In the drawings these divisions are extended inward beyond the ends of the other divisions, as at 9; but it is obvious that they may be distinguished in any other suitable manner. The operation of this portion of the device is as follows: To lind the day of the month any number of days after a given date, place the given date indicated in the intermediate disk 5 opposite or in register with O on the lower disk. It is then simply necessary to count around on the main disk the number of days and the date may be found on the middle disk in register with the number on the main disk. For example, if it be desired to determine the date of the ma turity of a note dated November 1 and running .for sixty days the division of disk 6 indicating November 1 will be brought to register with 0 on the main disk. The division on the main disk will then register with the division on the middle disk indicating December 31.

If it be desired to determine on what day of the week such anote will mature, the division on disk 3 indicating the day of the week on which November 1, occurred is brought into register with the division on the middle disk indicating November 1, this latter division being maintained in register with O on the main disk. The division on the topmost disk which is found to be in register with the division of the middle disk indicating Decem ber 31 will indicate the day of the week on which said note matures. If November 1 should fall on Tuesday, it will be found that the note would mature on Saturday. As this division is distinguished from the other day divisions on the upper disk, the person opererating the device will be advised instantly of this fact.

It is of course obvious that if it be desired to determine how many days there are between two given dates it will only be necessary to bring the earlier date division on the disk 7) into register with the Odivision on the main plate and to then find the later date, the registering division on the main plate giving at once the number of days between the two dates.

The main disk or dial a is provided at its periphery with two annular series it and t' of three hundred and sixty-five spaces each of which is numbered from 1 to 365, the numbers of one series reading in one direction around the dial and the numbers of the other series a reading in the reverse direction. The object of this is to make it possible to determine by a single adjustment of the disks the number of days there still remain before the maturity of the note. In this way the operator will be able to quickly determine the value of a note at any day between its date and the maturity of the note.

For the convenience of the note-teller and such persons as may use this device I provide the topmost disk with a perpetual monthly calendar, which consists of a series of figures arranged in vertical columns, as shown, each column containing seven divisions. Arranged to slide in the topmost disk parallel with the column of spaces numbered from 1 to 7 is a strip 1', on which is printed the days of the week, this strip being provided with divisions which correspond to and are adapted to register with the divisons containing the numerals. The strip is adapted to extend through slots it in the disk 0 at the top and bottom of the column of divisions in order that only seven of the day divisions on the strip will be exposed to View. It is obvious that by sliding the strip to bring the day of the week on which the month begins into register with the division bearing the numeral 1 that a calendar for the month will be produced.

While I desire it understood that I do not limit myself to any precise construction of the device, I prefer to form it as shown in Fig. 2. As therein shown the base-plate or diala is beveled outward and downward at its periphery, and its lower edge is turned under to form the bead Z, which is adapted to rest upon the table or other support. It will of course be understood that this head may be covered with cloth or leatherette or other suitable material to prevent it scratching highly-polished desks, &c. In the center of this main dial or base-plate is formed an annular depression on, through the bottom wall of which extends the pivot (Z. This pivot is in the form of a screw-bolt whose head bears against the under side of the bottom of the depression m. Mounted to rotate freely on this pivotbolt is a sleeve 11, which is formed with an annular flange 0 at its lower end, said flange fitting within the recess formed in the baseplate, its upper surface bearing against the under side of the intermediate month-disk 7/. This sleeve is threaded externally and receives a nut 19, which bears on the upper side of the topmost or day-disk. This nut clamps the intermediate and top disk together, and-the degree of friction desired between these disks may be regulated by the nut 11. Thrcaded on the upper end of the pivot-bolt is a nut 1 which bears against the upper end of the sleeve 02 and forces the intermediate or month disk against the base-plate or year-dial. In this manner the friction between the various disks or dials may be regulated.

It will thus be seen that I provide an extremely simple and efficient apparatus for the purpose in view.

It will be apparent to those skilled in the art that various mechanical embodiments of the invention are possible, and therefore I do not wish to be limited to the exact arrangement and construction shown.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. A date-teller comprising a main plate bearing an annular series of three hundred and sixty-five divisions numbered consecutively from 1 to 365, an intermediate disk concentrically pivoted on the main plate and bearing near its edge three hundred and sixty-five divisions divided into twelve series to correspond to the twelve months of the year, the divisions of each series being numbered to correspond with the days of the month, said numbers running in the same direction as the numbers on the main disk and a third disk concentrically pivoted above the intermediate disk and hearing at its periphery divisions adapted to register with the divisions on the intermediate disk, the divisions on this topmost disk being arranged to indicate the days of the week, whereby the day of the week on which a future date will fall any number of days after a given day may be readily determined the operation being to arrange the intermediate and topmost disks to bring the day of the week and of the month of a given date into register with the division numbered 365 or zero on the main plate, when the day of the week and the day of the month on which a future date will occur will be found in a radial line with the division on the main plate indicating the number of days between the given date and the future date.

2. A date-teller comprising a main or base plate bearing at its edge two annular series of three hundred and sixty-five divisions each numbered consecutively from 1 to 365, the numbers on one series of divisions reading in one direction around the plate and the divisions of the other series reading in the reverse direction around the plate, the divisions of the two series numbered 365 registering with each other and being exposed entirely around the plate, an intermediate disk concentrically pivoted on the main plate and bearing near its edge three hundred and sixtyfive divisions divided into twelve series to correspond to the twelve months of the year, the divisions of each series being numbered to correspond with the days of the month and the twelve series of divisions each bearing the name of a month, said numbers running in the same direction as the numbers in the adjoining annular series of numbers on the main disk, said divisions being exposed entirely around the disk and a'third disk concentrically pivoted above the intermediate disk and bearing at its periphery divisions adapted to register with the divisions on the intermediate disk, the divisions on this topmost disk bearing the names of the days of the week, whereby the day of the week on which a future date will fall any number of days after a given day may be readily determined.

3. A date-teller comprising a main plate bearing an exposed annular series of three hundred and sixty-five divisions numbered consecutively from 1 to 365, an intermediate smaller disk concentrically pivoted on the main plate and bearing near its edge three hundred and sixty-five divisions divided into twelve series to correspond to the twelve months of the year, the divisions of each series being numbered to correspond with the days of the month, said divisions being exposed and adapted to register with the divisions on the main plate, and a third disk concentrically pivoted above and smaller than the intermediate disk and bearing at its periphery divisions adapted to register With the divisions on the intermediate disk, the divisions on this topmost disk being arranged to indicate the days of the week, each division bearing a symbol denoting a day of the week, means to distinguish the Saturday and Sunday divisions from the other day divisions, and a series of figures on the top disk arranged in columns to indicate the days of the month and a movable strip arranged parallel with said columns of figures and bearing the names of the days of the Week arranged in such manner that they may be brought into register with the columns of figures.

4. A date-teller comprising a main baseplate provided with a depression at its center, a pivot-bolt extending upward at the center of said base-plate and freely rotatable therein, a sleeve loosely mounted on said pivot-bolt, a pair of disks mounted on said sleeve and supported on the main plate, a nut to clamp said disks together and a nut on the upper end of the pivot to secure the two disks to the main plate.

In testimony whereof I hereunto aflix my signature, in the presence of two witnesses, this 15th day of November, 1904.

J NO. L. MILTON.

Witnesses:

WVM. R. DAVIS, E. W OUsHINe. 

